A daily switch between US stocks (SPY) and long US Treasury bonds (TLT) using a 1‑week “heat” score (RSI). If stocks look hotter than bonds, hold bonds; otherwise hold stocks. Always fully in one fund, never both.

Each day it scores recent moves for SPY (big US stocks) and TLT (long‑term US Treasury bonds) using a 0–100 “heat” gauge (5‑day RSI). If SPY’s score is higher than TLT’s, it buys TLT; otherwise it buys SPY. It owns the cooler one, aiming for a short‑term snap‑back. Always 100% in one, rebalanced daily.

Out-of-sample edge: 11.1% annualized return with 16.9% max drawdown (better than SPY’s ~18.8%), lower volatility, and a 0.66 Sharpe/0.65 Calmar. A disciplined stock–bond rotation that smooths risk while chasing solid gains.